President Vladimir V. Putin of Russia in June. His denials of Russian meddling have been coy, though he said that “free-spirited” hackers might have spontaneously contributed to “the fight against those who say bad things about Russia._________________Hiromichi

I looked up the word in the dictionary, because I don't think we usually use it in a sentence like that. The dictionary gives the meaning "reluctant to give details, especially about something regarded as sensitive." so I would guess that's the meaning they wanted because Putin never really answered the question. Usually I have heard the word "coy" used in its other sense, "(especially with reference to a woman) making a pretense of shyness or modesty that is intended to be alluring."